/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/typeParameterConstraintInstantiation.ts ===
declare function AssertType(value:any, type:string):void;
// Check that type parameter constraints are properly instantiated

interface Mapper<T> {
    map<U extends T, V extends U[]>(f: (item: T) => U): V;
}

let m: Mapper<string>;
AssertType(m, "Mapper<string>");

let a = m.map((x: string) => x);  // string[]
AssertType(a, "string[]");
AssertType(m.map((x: string) => x), "string[]");
AssertType(m.map, "<U extends string, V extends U[]>((string) => U) => V");
AssertType((x: string) => x, "(string) => string");
AssertType(x, "string");
AssertType(x, "string");


